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Titolo:
Influence of raceway substrate and design on fin erosion and hatchery performance of rainbow trout
Autore:
Arndt, RE; Routledge, MD; Wagner, EJ; Mellenthin, RF;
Indirizzi:
Utah Div Wildlife Resources, Fisheries Expt Stn, Logan, UT 84321 USA Utah Div Wildlife Resources Logan UT USA 84321 t Stn, Logan, UT 84321 USA
Titolo Testata:
NORTH AMERICAN JOURNAL OF AQUACULTURE
fascicolo: 4, volume: 63, anno: 2001,
pagine: 312 - 320
SICI:
1522-2055(200110)63:4<312:IORSAD>2.0.ZU;2-M
Fonte:
ISI
Lingua:
ENG
Soggetto:
ONCORHYNCHUS-MYKISS; SALMO-GAIRDNERI; JUVENILE STEELHEAD; CONCRETE RACEWAYS; BEHAVIOR; STRESS; GROWTH;
Tipo documento:
Article
Natura:
Periodico
Settore Disciplinare:
Agriculture,Biology & Environmental Sciences
Citazioni:
22
Recensione:
Indirizzi per estratti:
Indirizzo: Arndt, RE Utah Div Wildlife Resources, Fisheries Expt Stn, 1465 W 200 N, Logan, UT 84321 USA Utah Div Wildlife Resources 1465 W 200 N Logan UT USA 84321 USA
Citazione:
R.E. Arndt et al., "Influence of raceway substrate and design on fin erosion and hatchery performance of rainbow trout", N AM J AQUA, 63(4), 2001, pp. 312-320

Abstract

Raceway substrate and design were manipulated in a series of four trials to improve fin condition of rainbow trout Oncorhynchus mykiss. In the first trial, fish were reared in either conventional concrete raceways or raceways fitted with a false floor overlaid with cobble and through which water and waste materials flowed. Growth, feed conversions, and mortalities were not influenced by treatment type, but fish reared in false-floor raceways exhibited an improvement in fin lengths. For trial 2, fish were raised in control raceways or raceways that contained two-dimensional, painted gravel patterns (2D) as a substrate or actual gravel affixed to the raceway bottom (3D) to provide a three-dimensional appearance. Growth, feed conversions, andmortalities were not influenced by treatment type, but fish in the 3D treatment had significantly better dorsal fins compared with the control and 2Dgroups. Anal fins, pelvic fins, and right pectoral fins were significantlybetter for control and 3D fish compared with 2D fish. For trial 3, fish were reared in either control raceways or raceways with walls and bottoms that had been smoothed by the application of a resin. Fish performance was notaffected by raceway coating; however, fish reared in the coated raceways had significantly more fin erosion than control fish over the course of the study, although by the end of the study these effects appear to have been transient. In trial 4, treatment raceways fitted with a cross-flow system, either with gravel substrate panels or without, were compared with plug-flowcontrols. At the end of the study, fish reared in the raceways with gravelhad better final weights, growth rates, and feed conversions compared withfish in the plug-flow controls. Fins were generally significantly better for the fish in both cross-flow raceways compared with the controls. The results indicate that raceway substrate and design can be manipulated to reduce fin erosion when culturing rainbow trout.

ASDD Area Sistemi Dipartimentali e Documentali, Università di Bologna, Catalogo delle riviste ed altri periodici
Documento generato il 13/07/20 alle ore 07:16:08